Networker

Re: [Networker] adv_disk in 7.0+ - do's & don'ts

2004-12-20 06:45:42
Subject: Re: [Networker] adv_disk in 7.0+ - do's & don'ts
From: "Wood, R A (Bob)" <WoodR AT CHEVRONTEXACO DOT COM>
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Date: Mon, 20 Dec 2004 11:44:14 -0000
John,
        We use the adv_disk option, there are a few things to bear in mind (not 
really gotchas just something to be aware of).
        When creating the device, give it a size (this will make future staging 
much easier to control as NW will be able to calculate the % used when 
comparing for high/low water marks).
        The blurb about being able to read whilst writing is correct but they 
fail to highlight the fact that you can only have 1 read going on at any one 
time (you can only run 1 clone OR 1 stage OR 1 restore from the device, whether 
it is writing or not).
        Been playing with this for several months now and I'm still not sure 
what the optimum size for such a device should be. On the one hand I can 
increase my parallelism (with cloning and staging) by having many smaller disks 
but, with other SAN devices being shared, I could run up against the max number 
of devices (I hope to add another 10TB to the system soon so I'll have a play 
then).
        
        That's about it, basically it works and works well, the speed of 
restores makes the extra data shuffling worth while (at the moment the data is 
handled 3 times (from client to disk, cloned to tape for offsite and staged to 
tape for longer term storage).

Regards
Bob

-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTMAIL.TEMPLE DOT EDU] 
On Behalf Of Ballinger, John M
Sent: 17 December 2004 18:33
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: [Networker] adv_disk in 7.0+ - do's & don'ts


Is anyone using the new adv_disk option in v7.0+  ?
We are in a small way and for the most part like it.

Are there any do's and don'ts ?

When an adv_disk device runs out of space and NetWorker issues the following 
"alert":
        NetWorker adv_file: (alert) Waiting for more available space on 
filesystem `/files3/_AF_readonly' what are your options ? Do you have to then 
run an emergency staging operation moving some old savesets from adv_disk to 
tape or will the system automatically do this right away. We have one storage 
node with the filesystems below: 
        /dev/dsk/c7t1d0s2    1469862496 1452013040 17849456    99%    /files1
        /dev/dsk/c8t2d0s2    1715189024 1507888704 207300320    88%    /files2
        /dev/dsk/c5t3d0s2    1469862496 1329754792 125409080    92%    /files3
        /dev/dsk/c6t4d0s2    1715189024 1687194968 27994056    99%    /files4
        /dev/dsk/c4t0d0s2    1393771232 1234703336 145130184    90%    /files5
        /dev/dsk/c4t0d1s2    1194656408 948107136 234602712    81%    /files6

And NetWorker showing:
        Device  Used            %Used
        ..files1        2029GB  100%
        ..files2        1829GB  100%
        ..files3        1711GB  100%
        ..files4        2002GB  100%
        ..files5        1197GB  86%
        ..files6        936 GB  0%      (Is my only option to fix this clearing 
the volume and then labelling it again ?)

and we have a staging policy setup with:
        High water mark 90%
        Low water mark  70%
        Saveset selection       oldest saveset
        Max storage period      100 Days
        Recover space interval  8 Hours
        Filesystem check interval 3 Hours
that's applied to all 6 adv_disk devices/volumes.

thanks - John

-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTMAIL.TEMPLE DOT 
EDU]On Behalf Of Terry Lemons
Sent: Tuesday, December 07, 2004 11:11 AM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: Re: [Networker] SnapImage for Solaris - any updates in sight?


Hi Oscar

Check out the "LEGATO NetWorker, Release 7.2, Release Supplement, UNIX Version" 
document on http://www.legato.com/resources/manuals.  The bottom of p. 18 talks 
about a new V7.2 feature called "data server agent" (DSA). Basically, I believe 
that DSA is SnapImage embedded into the standard NetWorker distribution.  I'm 
not sure if it is supported on every NetWorker platform, but I don't read any 
restrictions in the UNIX version, so I'll ASSume that all NetWorker UNIX 
versions have this feature.

So, I believe this is the SnapImage 'update' that you were asking about!

Hope this helps.
tl

Terry Lemons
CLARiiON Applications Integration Engineering
EMC²                 
where information lives
 
4400 Computer Drive, MS D239
Westboro MA 01580
Phone: 508 898 7312
Email:  Lemons_Terry AT emc DOT com


-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTMAIL.TEMPLE DOT EDU] 
On Behalf Of Oscar Olsson
Sent: Tuesday, December 07, 2004 12:47 PM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: [Networker] SnapImage for Solaris - any updates in sight?

It has been a while since SnapImage 1.6 was released for Solaris. It has its 
bugs, for instance problems with DAR recovers, especially large ones, and it 
lacks NDMP version 4 support, plus some other new features that have been 
introduced in, for instance, ONTAP.

So, will there be any update? It feels like there's much to be wished for in 
the next release? Any rumors/gossip at least? :)

//Oscar

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